الفهرس 
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Abstract
This study was carried out in a private orchard located at El- Bosylia village Edfu district, Aswan Governorate in which fourty – eight Bartemuda date palms ( produced from offshoots) were selected for achieving of this study. The uniform in vigour date palms were planted at 7x7 meters apart. The texture of the soil is silty clay (Table 1). The selected palms were 10 years old at the start of experiment, good physical conditions and free from pests and damages. Surface irrigation system using Nile water was followed.
The target of this study was examining the effect of using some slow release N fertilizers and humic substances as partial replacement of mineral N on growth aspects, tree nutritional status, flowering, fruit setting, yield and fruit quality of Bartemuda date palms grown under Aswan region conditions.
This experiment was arranged in a randomized complete block design (RCBD). Each treatment was replicated three times, one palm per each replicate.
Generally, the following measurements were determined during the three investigated seasons.
During both seasons, the following measurements were recorded:
SUMMARY AND CONCLUSION
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1- Vegetative growth characteristics Namely length, width and area of leaflet , number of leaflets/ leaf, leaf area(m)2, leaf length m, number of spines/ leaf and spine length.
2- Some leaf chemical components namely chlorophylls a & b , total chlorophylls, total carotenoids (mg/ g F.W.) and percentages of N, P, K and Mg in the leaves on dry weight basis.
3- Some flowering aspects namely length and girth of spathe, number of strands / spathe and number of female flowers and fruits/ spathe.
4- Percentages of initial fruit setting and fruit retention, yield/ palm (kg.) and bunch weight (kg.)
5- Physical and chemical characteristics of the fruits i.e. weight (g.), height and diameter(cm) of fruit , percentage of seeds and flesh of fruit , T.S.S. % , total , reducing and non reducing sugars %, total acidity %, total fibre % and total soluble tannins%.
The nearly same obtained data during both seasons could.